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maintainer.exe

Clock Hand

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application maintainer.exe by Clock Hand has been detected as adware by 28 anti-malware scanners. It runs as a separate (within the context of its own process) windows Service named “MaintainerSvc1.65.3138243”. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages.
Publisher:
Clock Hand  (signed and verified)

Version:
1.0.5542.22273

MD5:
a36070aec9866f6af7e93ebd12b0fe26

SHA-1:
b43b61b9f2ddd446feb8bcf2ddfac059a0a1fb14

SHA-256:
17cb1fdd7b15f95647a48d819992ad2486fd3f6433897375cc8c316d9e97b318

Scanner detections:
28 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
4/23/2024 3:04:55 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Variant.Adware.SwiftBrowse.1
701

AhnLab V3 Security
Adware/Win32.SwiftBrowse
2015.03.06

Avira AntiVirus
ADWARE/BrowseFox.Gen7
7.11.214.2

avast!
Win32:PUP-gen [PUP]
2014.9-150305

AVG
Generic6
2016.0.3179

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.1535

Bitdefender
Gen:Variant.Adware.SwiftBrowse.1
1.0.20.320

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Agent-22685
0.98/21511

Comodo Security
Application.Win32.BrowseFox.B
21306

Dr.Web
Trojan.BPlug.437
9.0.1.064

Emsisoft Anti-Malware
Gen:Variant.Adware.SwiftBrowse
8.15.03.05.08

ESET NOD32
Win32/BrowseFox.V potentially unwanted
9.11276

F-Prot
W32/A-de841313
v6.4.7.1.166

F-Secure
Gen:Variant.Adware.SwiftBrowse
11.2015-05-03_5

G Data
Gen:Variant.Adware.SwiftBrowse
15.3.25

K7 AntiVirus
Trojan
13.200.15176

Kaspersky
not-a-virus:AdWare.Win32.Yotoon
14.0.0.2391

Malwarebytes
PUP.Optional.SwiftBrowse
v2015.03.05.08

McAfee
BrowseFox-FTR
5600.6835

MicroWorld eScan
Gen:Variant.Adware.SwiftBrowse.1
16.0.0.192

NANO AntiVirus
Riskware.Win32.Kranet.dgiwfc
0.30.0.296

nProtect
Trojan-Clicker/W32.Yotoon.123632
15.03.05.01

Quick Heal
AdWare.Yotoon.A5
3.15.14.00

Reason Heuristics
PUP.Service.Yontoo
15.3.5.20

SUPERAntiSpyware
Adware.SwiftBrowse
10015

Vba32 AntiVirus
AdWare.Yotoon
3.12.26.3

Zillya! Antivirus
Adware.Kranet.Win32.476
2.0.0.2089

File size:
120.7 KB (123,632 bytes)

Product version:
1.0.5542.22273

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\ProgramData\0c3a7392-abfa-41f5-95a9-5e339ac76b7b\maintainer.exe

Digital Signature
Signed by:
Clock Hand

Authority:
VeriSign, Inc.

Valid from:
1/10/2015 6:00:00 PM

Valid to:
1/11/2016 5:59:59 PM

Subject:
CN=Clock Hand, O=Clock Hand, L=San Diego, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
456A42223C623741F26F18A9D4223E47

File PE Metadata
Compilation timestamp:
3/5/2015 2:22:33 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:rK35/9oxfTk+oLvn6PPQI0ypxCO73bZv4fRPq:rKCLPmCL7rZv4fRi

Entry address:
0x8A72

Entry point:
E8, 95, 57, 00, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 81, EC, 28, 03, 00, 00, A1, 68, B2, 41, 00, 33, C5, 89, 45, FC, 83, 7D, 08, FF, 57, 74, 09, FF, 75, 08, E8, 79, 45, 00, 00, 59, 83, A5, E0, FC, FF, FF, 00, 6A, 4C, 8D, 85, E4, FC, FF, FF, 6A, 00, 50, E8, 7A, F3, FF, FF, 8D, 85, E0, FC, FF, FF, 89, 85, D8, FC, FF, FF, 8D, 85, 30, FD, FF, FF, 83, C4, 0C, 89, 85, DC, FC, FF, FF, 89, 85, E0, FD, FF, FF, 89, 8D, DC, FD, FF, FF, 89, 95, D8, FD, FF, FF, 89, 9D, D4, FD, FF, FF, 89, B5, D0, FD, FF, FF, 89, BD, CC...
 
[+]

Entropy:
6.1806

Code size:
68.5 KB (70,144 bytes)

Service
Display name:
MaintainerSvc1.65.3138243

Type:
Win32OwnProcess

Depends on:
RPCSS


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